Like it or not, we're building an Internet operating system, a platform that will host everything from mobile phone apps to web apps. The platform wars of the 1980s and 1990s are nothing to the platform wars that are about to erupt on the net, as major players try to solidify their hold on the future. What is the role of open source in this future? How can we build an "internet operating system" of small pieces loosely joined (like Linux, or the Drupal ecosystem) rather than one that is owned by a single platform vendor?